In his commentary on the Light Verse (Q. 24:35), the Andalusian mystic and Qurʾān exegete Abū al-Ḥakam Ibn Barrajān (d. 1141) presents the blessed tree (al-shajara al-mubāraka) not simply as a terrestrial olive tree in Syria or even as a mystical allegory, but as the ultimate locus of divine disclosure and the highest metaphysical entity in the cosmos that subsumes the world of creation. This article assesses the originality of Ibn Barrajān’s contribution to the heavenly tree motif by examining his (...) unique mystical and exegetical theories informing his ontological reading of the blessed tree, including the concept of the ‘reality upon which creation is created’ and the ‘universal servant’. In addition to analysing the internal logic of Ibn Barrajān’s discourse, this article explores the larger interpretive themes recurrent across exoteric, Sufi, and philosophical interpretations of the Light Verse up to the twelfth century that the author may have had access to in al-Andalus, including the treatises of the Brethren of Purity (Ikhwān al-ṣafā) and Biblical sources. Finally, this article highlights how Ibn Barrajān weaves the Qurʾānic good tree (al-shajara al-ṭayyiba) and the lote tree of the furthest boundary (sidrat al-muntahā) into his overarching understanding of the blessed tree. It also considers how his reading may have contributed to later readings by Ibn ʿArabī (d. 1240) and some of his intellectual heirs. (shrink)

Section one of this article gives the narrative background to the love affair between Otto Gross and Else Jaffé. Otto Gross took Freud's psychoanalytic method in a libertarian direction and he became an influential figure in German anarchist circles shortly before 1914. Else Jaffé was a leading figure in Heidelberg's academic community. Section 2 provides the first complete translation of the Gross-Jaffé letters. Section 3 contrasts the positions of Gross and Max Weber to Nietzsche and comments on Else Jaffé's intermediate (...) role. It was her person that contributed to the development of both men's thinking on the erotic. An appendix provides the transcription of the Gross-Jaffé correspondence in German. (shrink)

Think of a number, any number, or properties like fragility and humanity. These and other abstract entities are radically different from concrete entities like electrons and elbows. While concrete entities are located in space and time, have causes and effects, and are known through empirical means, abstract entities like meanings and possibilities are remarkably different. They seem to be immutable and imperceptible and to exist "outside" of space and time. This book provides a comprehensive critical assessment of the problems raised (...) by abstract entities and the debates about existence, truth, and knowledge that surround them. It sets out the key issues that inform the metaphysical disagreement between platonists who accept abstract entities and nominalists who deny abstract entities exist. Beginning with the essentials of the platonist–nominalist debate, it explores the key arguments and issues informing the contemporary debate over abstract reality: arguments for platonism and their connections to semantics, science, and metaphysical explanation the abstract–concrete distinction and views about the nature of abstract reality epistemological puzzles surrounding our knowledge of mathematical entities and other abstract entities. arguments for nominalism premised upon concerns about paradox, parsimony, infinite regresses, underdetermination, and causal isolation nominalist options that seek to dispense with abstract entities. Including chapter summaries, annotated further reading, and a glossary, _Entities_ is essential reading for anyone seeking a clear and authoritative introduction to the problems raised by abstract entities. (shrink)

Predictive processing accounts of neural function view the brain as a kind of prediction machine that forms models of its environment in order to anticipate the upcoming stream of sensory stimulation. These models are then continuously updated in light of incoming error signals. Predictive processing has offered a powerful new perspective on cognition, action, and perception. In this chapter we apply the insights from predictive processing to the study of emotions. The upshot is a picture of emotion as inseparable from (...) perception and cognition, and a key feature of the embodied mind. (shrink)

James Overman: Joyce reading Nietzsche -- Ecce auctor: self-creation in A portrait of the artist as a young man -- Aufhebung baby: auto-genesis and alterity in Ulysses -- Joyce's multifarious styles in Ulysses -- Also sprach Molly Bloom -- The gay science of Finnegans wake.

It may be unethical to deny children with cystic fibrosis access to ethically approved clinical trials from which they might benefitDespite advances in nutritional management, aggressive antibiotic usage, and physiotherapy, cystic fibrosis remains a life limiting illness with high morbidity that imposes considerable burdens on children and families.1 Although survival to 40 years is predicted for children born in 1990s, the median age of death in 2003 was 24.2 years .The pathophysiological features of CF are produced by a defective gene (...) on chromosome 7, resulting in the defective production of a protein that regulates cellular ion transport. Defective ion transport is thought to lead to increased mucus viscosity , with poor airway clearance, recurrent bacterial infection, lung damage, and death.Gene therapy , the insertion of a normally functioning gene into deficient host cells using a suitable vector, is a potential treatment or cure for diseases produced by single gene defects—for example, CF. Gene therapy does, however, have potential or actual risks, leading many to suggest that evidence of efficacy in adults should be demonstrated before trials are conducted in children. Many serious diseases in adults such as CF have their onset in childhood. If early treatment provides greater hopes of benefit, children may be more appropriate targets for GT in CF than adults. It may be unethical to deny them access to properly constructed, ethically approved clinical trials from which they might benefit.Since research in children should be scientifically valid, in the child’s best interests, and the subject of valid consent, this article will consider these parameters in relation to trials of GT in children with CF. Because of the importance of consumer participation in the design of research we present the results of a questionnaire about GT trials delivered …. (shrink)

The capacity to provide satisfactory nursing care is being increasingly compromised by current trajectories of healthcare funding and governance. The purpose of this paper is to examine how well Marxist theories of the state and its relationship with capital can explain these trajectories in this period of ever‐increasing austerity. Following a brief history of the current crisis, it examines empirically the effects of the crisis, and of the current trajectory of capitalism in general, upon the funding and organization of the (...) UK and US healthcare systems. The deleterious effect of growing income inequalities to the health of the population is also addressed. Marx's writings on the state and its relation to the capitalist class were fragmentary and historically and geographically specific. From them, we can extract three theoretical variants: the instrumentalist theory of the state, where the state has no autonomy from capital; the abdication theory, whereby capital abstains from direct political power and relies on the state to serve its interests; and the class‐balance theory, whereby the struggle between two opposed classes allows the state to assert itself. Discussion of modern Marxist interpretations includes Poulantzas's abdication theory and Miliband's instrumentalist theory. It is concluded that, despite the pluralism of electoral democracies, the bourgeoisie do have an overweening influence upon the state. The bourgeoisie's ownership of the means of production provides the foundation for its influence because the state is obliged to rely on it to manage the supply of goods and services and the creation of wealth. That power is further reinforced by the infiltration of the bourgeoisie into the organs of state. The level of influence has accelerated rapidly over recent decades. One of the consequences of this has been that healthcare systems have become rich pickings for the evermore confident bourgeoisie. (shrink)

This article explores the role of the Deaf child as peer educator. In schools where sign languages were banned, Deaf children became the educators of their Deaf peers in a number of contexts worldwide. This paper analyses how this peer education of sign language worked in context by drawing on two examples from boarding schools for the deaf in Nicaragua and Thailand. The argument is advanced that these practices constituted a child-led oppositional pedagogy. A connection is drawn to Freire’s (1972) (...) theory of critical pedagogy. Deaf children’s actions as peer educators are framed as an act of resistance towards the oppression of their language and culture. A contrast is drawn between oralist pedagogy that is historically associated with punitive practices and didactic methods and the experiential and dialogic interaction that characterised peer learning of sign languages. The argument is made that the peer teaching and learning processes enabled the self-actualisation of the Deaf children whereas the oralist methods were based on a deficit model that focused on modifying deaf children according to the norms of hearing society. The implications of this for current policy and practice are inferred to be about access to sign languages and the importance of Deaf communities in deaf children’s education. The argument is made that space needs to be created for deaf children to engage in peer learning. (shrink)

The emphasis on evidence based medicine (EBM) has placed increased focus on finding timely answers to clinical questions in presence of patients. Using a combination of natural language processing for the generation of clinical excerpts and information theoretic distance based clustering, we evaluated multiple approaches for the efficient presentation of context-sensitive EBM excerpts.

We develop a new version of the causal theory of spacetime. Whereas traditional versions of the theory seek to identify spatiotemporal relations with causal relations, the version we develop takes causal relations to be the grounds for spatiotemporal relations. Causation is thus distinct from, and more basic than, spacetime. We argue that this non-identity theory, suitably developed, avoids the challenges facing the traditional identity theory.

Bestselling author Sam Harris dismantles the most common justification for religious faith-that a moral system cannot be based on science.

In this enlightening book, Sam Harris argues that free will is an illusion but that this truth should not undermine morality or diminish the importance of social and political freedom; indeed, this truth can and should change the way we think about some of the most important questions in life.

Formal models of appearance and reality have proved fruitful for investigating structural properties of perceptual knowledge. This paper applies the same approach to epistemic justification. Our central goal is to give a simple account of The Preface, in which justified belief fails to agglomerate. Following recent work by a number of authors, we understand knowledge in terms of normality. An agent knows p iff p is true throughout all relevant normal worlds. To model The Preface, we appeal to the normality (...) of error. Sometimes, it is more normal for reality and appearance to diverge than to match. We show that this simple idea has dramatic consequences for the theory of knowledge and justification. Among other things, we argue that a proper treatment of The Preface requires a departure from the internalist idea that epistemic justification supervenes on the appearances and the widespread idea that one knows most when free from error. (shrink)

Sam Harris dismantles the most common justification for religious faith--that a moral system cannot be based on science.

Philosophy and Phenomenological Research, Volume 104, Issue 1, Page 19-49, January 2022.

According to the KK-principle, knowledge iterates freely. It has been argued, notably in Greco, that accounts of knowledge which involve essential appeal to normality are particularly conducive to defence of the KK-principle. The present article evaluates the prospects for employing normality in this role. First, it is argued that the defence of the KK-principle depends upon an implausible assumption about the logical principles governing iterated normality claims. Once this assumption is dropped, counter-instances to the principle can be expected to arise. (...) Second, it is argued that even if the assumption is maintained, there are other logical properties of normality which can be expected to lead to failures of KK. Such failures are noteworthy, since they do not depend on either a margins-for-error principle or safety condition of the kinds Williamson appeals to in motivating rejection KK. “Introduction: KK and Being in a Position to Know” Section formulates two versions of the KK-Principle; “Inexact Knowledge and Margins for Error” Section presents a version of Williamson’s margins-for-error argument against it; “Knowledge and Normality” and “Iterated Normality” Sections discuss the defence of the KK-Principle due to Greco and show that it is dependent upon the implausible assumption that the logic of normality ascriptions is at least as strong as K4; finally, “Knowledge in Abnormal Conditions” and “Higher-Order Ignorance Inside the Margins” Sections argue that a weakened version of Greco’s constraint on knowledge is plausible and demonstrate that this weakened constraint will, given uncontentious assumptions, systematically generate counter-instances to the KK-principle of a novel kind. (shrink)

In non‐literal uses of language, the content an utterance communicates differs from its literal truth conditions. Loose talk is one example of non‐literal language use (amongst many others). For example, what a loose utterance of (1) communicates differs from what it literally expresses: (1) Lena arrived at 9 o'clock. Loose talk is interesting (or so I will argue). It has certain distinctive features which raise important questions about the connection between literal and non‐literal language use. This paper aims to (i.) (...) introduce a range of novel data demonstrating certain overlooked features of loose talk, and (ii.) develop a new theory of the phenomenon which accounts for these data. In particular, this theory is motivated by the need to explain minimal pairs such as (2)-(3): (2) Lena arrived at 9 o'clock, but she did not arrive at 9 o'clock exactly. (3) ?? Lena did not arrive at 9 o'clock exactly, but she arrived at 9 o'clock. (2) and (3) agree in their truth conditions. Yet they differ in felicity. As such, they constitute a problem for any account which hopes to predict the acceptability of the loose use of a sentence from its truth conditions and the context of utterance alone. Instead, it will be argued, to explain loose talk phenomena we must posit an additional layer of meaning outstripping truth conditions. This layer of meaning is shown to exhibit a range of properties, all of which point to its being semantically encoded. Thus, if correct, the theory provides a new example of how semantic meaning must extend beyond literal, truth‐conditional content. (shrink)

Inquiry aims at knowledge. Your inquiry into a question succeeds just in case you come to know the answer. However, combined with a common picture on which misleading evidence can lead knowledge to be lost, this view threatens to recommend a novel form of dogmatism. At least in some cases, individuals who know the answer to a question appear required to avoid evidence bearing on it. In this paper, we’ll aim to do two things. First, we’ll present an argument for (...) this novel form of dogmatism and show that it presents a substantive challenge. Second, we’ll consider a way those who take knowledge to be the aim of inquiry can mount a response. In the course of doing so, we’ll try to get clearer on the normative connections between inquiry, knowledge and evidence gathering. (shrink)

Some critics argue that the types of psychiatric diagnosis found in the Diagnostic and Statistical Manual of Mental Disorders and International Classification of Disease are superfluous and should be abandoned. These are known as categorical polythetic psychiatric diagnoses. To receive a categorical polythetic psychiatric diagnosis an individual need only exhibit some, rather than all, of the symptoms on the diagnostic criteria. Consequently, categorical polythetic psychiatric diagnoses only associate an individual with a range of symptoms rather than specify which symptoms they (...) have. Drawing on Giere’s account of scientific models, I portray categorical polythetic psychiatric diagnoses as abstract models that guide the building of less abstract models. These models can specify which symptoms a particular individual has. Additionally, categorical polythetic psychiatric diagnoses can guide investigation of symptoms towards difficult to spot symptoms, guide investigation towards changing symptoms, and guide investigation towards how symptoms manifest. These important roles mean categorical polythetic psychiatric diagnoses should not be abandoned. (shrink)

Suppositional theories of conditionals take apparent similarities between supposition and conditionals as a starting point, appealing to features of the former to provide an account of the latter. This paper develops a novel form of suppositional theory, one which characterizes the relationship at the level of semantics rather than at the level of speech acts. In the course of doing so, it considers a range of novel data which shed additional light on how conditionals and supposition interact.

On a now orthodox view, humans and many other animals possess a “number sense,” or approximate number system, that represents number. Recently, this orthodox view has been subject to numerous critiques that question whether the ANS genuinely represents number. We distinguish three lines of critique – the arguments from congruency, confounds, and imprecision – and show that none succeed. We then provide positive reasons to think that the ANS genuinely represents numbers, and not just non-numerical confounds or exotic substitutes for (...) number, such as “numerosities” or “quanticals,” as critics propose. In so doing, we raise a neglected question: numbers of what kind? Proponents of the orthodox view have been remarkably coy on this issue. But this is unsatisfactory since the predictions of the orthodox view, including the situations in which the ANS is expected to succeed or fail, turn on the kind of number being represented. In response, we propose that the ANS represents not only natural numbers, but also non-natural rational numbers. It does not represent irrational numbers, however, and thereby fails to represent the real numbers more generally. This distances our proposal from existing conjectures, refines our understanding of the ANS, and paves the way for future research. (shrink)

The popularity of ‘food sovereignty’ to cover a range of positions, interventions, and struggles within the food system is testament, above all, to the term’s adaptability. Food sovereignty is centrally, though not exclusively, about groups of people making their own decisions about the food system—it is a way of talking about a theoretically-informed food systems practice. Since people are different, we should expect decisions about food sovereignty to be different in different contexts, albeit consonant with a core set of principles. (...) In this paper we look at the analytical points of friction in applying ideas of food sovereignty within the context of Indigenous struggles in North America. This, we argue, helps to clarify one of the central themes in food sovereignty: that it is a continuation of anti-colonial struggles, even in post-colonial contexts. Such an examination has dividends both for scholars of food sovereignty and for those of Indigenous politics: by helping to problematize notions of food sovereignty and postcoloniality, but also by posing pointed questions around gender for Indigenous struggles. (shrink)

Kant proclaimed that all theodicies must fail in ?On the Miscarriage of All Philosophical Trials in Theodicy?, but it is mysterious why he did so since he had developed a theodicy of his own during the critical period. In this paper, I offer an explanation of why Kant thought theodicies necessarily fail. In his theodicy, as well as in some of his works in ethics, Kant explained moral evil as resulting from unavoidable limitations in human beings. God could not create (...) finite beings without such limitations and so could not have created humans that were not prone to committing immoral acts. However, the work of Carl Christian Eberhard Schmid showed Kant that given his own beliefs about freedom and the nature of responsibility one could not account for moral evil in this way without tacitly denying that human beings were responsible for their actions. This result is significant not only because it explains an otherwise puzzling shift in Kant's philosophy of religion, but also because it shows that the theodicy essay provides powerful evidence that Kant's thinking about moral evil and freedom underwent fundamental shifts between early works such as the Groundwork and later works like the Religion within the Limits of Mere Reason. (shrink)

This article introduces a new reflection principle. It is based on the idea that whatever is true in all entities of some kind is also true in a set-sized collection of them. Unlike standard reflection principles, it does not re-interpret parameters or predicates. This allows it to be both consistent in all higher-order languages and remarkably strong. For example, I show that in the language of second-order set theory with predicates for a satisfaction relation, it is consistent relative to the (...) existence of a 2-extendible cardinal (Theorem 7.12) and implies the existence of a proper class of 1-extendible cardinals (Theorem 7.9). (shrink)

This paper refines a controversial proposal: that core systems belong to a perceptual kind, marked out by the format of its representational outputs. Following Susan Carey, this proposal has been understood in terms of core representations having an iconic format, like certain paradigmatically perceptual outputs. I argue that they don’t, but suggest that the proposal may be better formulated in terms of a broader analogue format type. Formulated in this way, the proposal accommodates the existence of genuine icons in perception, (...) and avoids otherwise troubling objections. (shrink)

In an interesting experimental study, Bonini et al. (1999) present partial support for truth-gap theories of vagueness. We say this despite their claim to find theoretical and empirical reasons to dismiss gap theories and despite the fact that they favor an alternative, epistemic account, which they call ‘vagueness as ignorance’. We present yet more experimental evidence that supports gap theories, and argue for a semantic/pragmatic alternative that unifies the gappy supervaluationary approach together with its glutty relative, the subvaluationary approach.

This article engages with current discussions on the politics of aesthetics to theorize the role of popular art in reproducing or contesting urban orders. Specifically, we engage with scholars who have taken up the work of Jacques Rancière to understand how power structures are normalized through ‘the distribution of the sensible’. Building on and critically engaging with debates on the ‘post-political city’, we suggest that all too often scholars fall back on a binary, state-centric approach that depicts non-state popular aesthetics (...) as either revolutionary and disruptive, or as indicative of an alternative form of oppression. Drawing on our work in Kingston, Jamaica, and Rio de Janeiro, Brazil, we argue that sensorial-political, art-based urban struggles shape multiple urban orders that are distinct but not necessarily antagonistic. Applying Stuart Hall’s work on popular culture to contexts of criminal governance, we show how art is often simultaneously supportive and disruptive of urban orders. (shrink)

Argues that the normative relation of commitment is routinely overlooked by philosophers, and that investigating it reveals some interesting similarities between the moral and rational domains.

The theoretical virtue of parsimony values the minimizing of theoretical commitments, but theoretical commitments come in two kinds : ontological and ideological. While the ontological commitments of a theory are the entities it posits, a theory’s ideological commitments are the primitive concepts it employs. Here, I show how we can extend the distinction between quantitative and qualitative parsimony, commonly drawn regarding ontological commitments, to the domain of ideological commitments. I then argue that qualitative ideological parsimony is a theoretical virtue. My (...) defense proceeds by demonstrating the merits of qualitative ideological parsimony and by showing how the qualitative conception of ideological parsimony undermines two notable arguments from ideological parsimony: David Lewis’ defense of modal realism and Ted Sider’s defense of mereological nihilism. (shrink)

Jerry Fodor deemed informational encapsulation ‘the essence’ of a system’s modularity and argued that human perceptual processing comprises modular systems, thus construed. Nowadays, his conclusion is widely challenged. Often, this is because experimental work is seen to somehow demonstrate the cognitive penetrability of perceptual processing, where this is assumed to conflict with the informational encapsulation of perceptual systems. Here, I deny the conflict, proposing that cognitive penetration need not have any straightforward bearing on the conjecture that perceptual processing is composed (...) of nothing but informationally encapsulated modules, the conjecture that each and every perceptual computation is performed by an informationally encapsulated module, and the consequences perceptual encapsulation was traditionally expected to have for a perception-cognition border, the epistemology of perception and cognitive science. With these points in view, I propose that particularly plausible cases of cognitive penetration would actually seem to evince the encapsulation of perceptual systems rather than refute/problematize this conjecture. (shrink)

There is a large literature exploring how accuracy constrains rational degrees of belief. This paper turns to the unexplored question of how accuracy constrains knowledge. We begin by introducing a simple hypothesis: increases in the accuracy of an agent’s evidence never lead to decreases in what the agent knows. We explore various precise formulations of this principle, consider arguments in its favour, and explain how it interacts with different conceptions of evidence and accuracy. As we show, the principle has some (...) noteworthy consequences for the wider theory of knowledge. First, it implies that an agent cannot be justified in believing a set of mutually inconsistent claims. Second, it implies the existence of a kind of epistemic blindspot: it is not possible to know that one’s evidence is misleading. (shrink)

A proposed empirical criterion for task susceptibility to introspective awareness distinguishes cognitive processes of which one cannot be aware from those of which one can be aware. The empirical criterion for task susceptibility to awareness effects proposes that there are tasks which cannot be affected by awareness of the rules constituting the tasks. These criteria were applied to research programmes in rule-learning in which past studies in the area of learning without awareness were included as well as current research in (...) implicit learning. The principal question addressed in these studies is whether or not rule-learning can occur without awareness. An historical review showed that rule-learning occurred in tasks which were both susceptible and insusceptible to introspective awareness and to awareness effects. Accordingly, it has been proposed that rather than attempt to decide theoretically and empirically between the opposing hypotheses—that of “cognitive learning” on the one hand, which assumes that awareness is a necessary condition for rule-learning, and that of “automatic learning” on the other, which assumes direct, automatic and unconscious processes—efforts should rather be directed toward developing a theoretical approach which is based on both conscious and unconscious processes. However, an approach of this kind encounters severe problems, such as the generation of contradictory predictions, which result from the employment of several incongruent and irreconcilable models of explanation. The criteria for task susceptibility offer a way out of these difficulties. (shrink)

Two important questions arise concerning the properties that constitute the phenomenal characters of our experiences: first, where these properties exist, and, second, whether they are tied to our consciousness of them. Such properties can either exist externally to the perceiving subject, or internally to her. This article argues that phenomenal characters, and specifically the phenomenal characters of colours, may exist independently of consciousness and that they are internal to the subject. We defend this combination of claims against a recent criticism (...) according to which the unconscious phenomenal character of colours exists externally to the subject. We defend internalism about (potentially unconscious) phenomenal character by appealing to recent neuroscientific and behavioural evidence, and by rejecting the claim that externalism about phenomenal character is dialectically in a better position than internalism. In addition, we briefly present certain difficulties for externalist views of phenomenal character. These concern cases where the perceptual relation fails, but a perceptual experience still results. These points suffice to defuse the externalist critique of our view, and support the internalist variant of the consciousness-independence claim as the most plausible account of the unconscious phenomenal character of colours. (shrink)

Since Aristotle, many writers have treated metaphors and similes as equals: any metaphor can be paraphrased as a simile, and vice-versa. This property of metaphors is the basis for psycholinguistic comparison theories of metaphor comprehension. However, if metaphors cannot always be paraphrased as similes, then comparison theories must be abandoned. The different forms of a metaphor—the comparison and categorical forms—have different referents. In comparison form, the metaphor vehicle refers to the literal concept, e.g. 'in my lawyer is like a shark', (...) the term 'shark' refers to the literal fish. In categorical form, 'my lawyer is a shark', 'shark' refers to an abstract (metaphorical) category of predatory creatures. This difference in reference makes it possible for a metaphor and its corresponding simile to differ (a) in interpretability and (b) in meaning. Because a metaphor cannot always be understood in terms of its corresponding simile, we conclude that comparison theories of metaphor are fundamentally flawed. (shrink)

This paper develops an account of pluralities based on the following simple claim: some things are nothing over and above the individual things they comprise. For some, this may seem like a mysterious statement, perhaps even meaningless; for others, like a truism, trivial and inferentially inert. I show that neither reaction is correct: the claim is both tractable and has important consequences for a number of debates in philosophy.

Offers a conciliatory solution to one of the central contemporary debates in the theory of rationality, the debate about the proper formulation of rational requirements. Introduces a novel conception of the “symmetry problem” for wide scope rational requirements, and sketches a theory of rational commitment as a response.

The visual system adapts to a wide range of visual features, from lower-level features like color and motion to higher-level features like causality and, perhaps, number. According to some, adaptation is a strictly perceptual phenomenon, such that the presence of adaptation licenses the claim that a feature is truly perceptual in nature. Given the theoretical importance of claims about adaptation, then, it is important to understand exactly when the visual system does and does not exhibit adaptation. Here, we take as (...) a case study one specific kind of adaptation: visual adaptation to size. Supported by evidence from four experiments, we argue that, despite robust effects of size adaptation in the lab, (1) size adaptation effects are phenomenologically underwhelming (in some cases, hardly appreciable at all), (2) some effects of size adaptation appear contradictory, and difficult to explain given current theories of size adaptation, and (3) prior studies on size adaptation may have failed to isolate size as the adapted dimension. Ultimately, we argue that while there is evidence to license the claim that size adaptation is genuine, size adaptation is a puzzling and poorly understood phenomenon. (shrink)